| Hardress Nathaniel Swaim | |
| Office: | Judge of the United States Court of Appeals for the Seventh Circuit |
| Term Start: | October 21, 1949 |
| Term End: | July 30, 1957 |
| Appointer: | Harry S. Truman |
| Predecessor: | Seat established by 63 Stat. 493 |
| Successor: | William Lynn Parkinson |
| Office1: | Justice of the Indiana Supreme Court |
| Term Start1: | January 1, 1939 |
| Term End1: | January 1, 1945 |
| Predecessor1: | James P. Hughes |
| Successor1: | Howard Young Sr. |
| Birth Name: | Hardress Nathaniel Swaim |
| Birth Date: | 30 November 1890 |
| Birth Place: | Zionsville, Indiana |
| Education: | DePauw University (AB) University of Chicago Law School (JD) |
Hardress Nathaniel Swaim (November 30, 1890 – July 30, 1957) was a justice of the Indiana Supreme Court and later a United States circuit judge of the United States Court of Appeals for the Seventh Circuit.
Born in Zionsville, Indiana, Swaim received an Artium Baccalaureus degree from DePauw University in 1913 and a Juris Doctor from the University of Chicago Law School in 1916. He was in private practice in Indianapolis, Indiana from 1916 to 1939, interrupted by service in the United States Army as a First Lieutenant from 1917 to 1918. He was Comptroller of the City of Indianapolis from 1936 to 1947. He was a justice of the Indiana Supreme Court from January 1, 1939 to January 1, 1945, thereafter returning to private practice in Indianapolis from 1945 to 1949.
Swaim received a recess appointment from President Harry S. Truman on October 21, 1949, to the United States Court of Appeals for the Seventh Circuit, to a new seat authorized by 63 Stat. 493. He was nominated to the same position by President Truman on January 5, 1950. He was confirmed by the United States Senate on February 8, 1950, and received his commission on February 10, 1950. His service terminated on July 30, 1957, due to his death.